Zobrazeno 1 - 10
of 216
pro vyhledávání: '"Roudier, Th."'
Autor:
Ariste, A. López, Georgiev, S., Mathias, Ph., Lèbre, A., Wavasseur, M., Josselin, E., Konstantinova-Antova, R., Roudier, Th.
Publikováno v:
A&A 661, A91 (2022)
Understanding convection in red supergiants and the mechanisms that trigger the mass loss from these evolved stars are the general goals of most observations of Betelgeuse and its inner circumstellar environment. Linear spectropolarimetry of the atom
Externí odkaz:
http://arxiv.org/abs/2202.12011
Large scale flows in the Sun play an important role in the dynamo process linked to the solar cycle. The important large scale flows are the differential rotation and the meridional circulation with an amplitude of km/s and few m/s , respectively. Th
Externí odkaz:
http://arxiv.org/abs/1712.05255
As the global magnetic field of the Sun has an activity cycle, one expects to observe some variation of the dynamical properties of the flows visible in the photosphere. We investigate the flow field during the solar cycle by analysing SDO/HMI observ
Externí odkaz:
http://arxiv.org/abs/1611.02152
Context: The determination of the underlying mechanisms of the magnetic elements diffusion over the solar surface is still a challenge. Understanding the formation and evolution of the solar network (NE) is a challenge, because it provides a magnetic
Externí odkaz:
http://arxiv.org/abs/1604.04118
Publikováno v:
A&A 586, A123 (2016)
We study the magnetic flux carried by pores located outside active regions with sunspots and investigate their possible contribution to the reversal of the global magnetic field of the Sun. We find that they contain a total flux of comparable amplitu
Externí odkaz:
http://arxiv.org/abs/1511.06894
Context: Studying the motions on the solar surface is fundamental for understanding how turbulent convection transports energy and how magnetic fields are distributed across the solar surface. Aims: From horizontal velocity measurements all over the
Externí odkaz:
http://arxiv.org/abs/1407.0196
We compare measurements of horizontal flows on the surface of the Sun using helioseismic time--distance inversions and coherent structure tracking of solar granules. Tracking provides 2D horizontal flows on the solar surface, whereas the time--distan
Externí odkaz:
http://arxiv.org/abs/1305.0875
Autor:
Roudier, Th., Rieutord, M., Prat, V., Malherbe, J. M., Renon, N., Frank, Z., Svanda, M., Berger, T., Burston, R., Gizon, L.
The measurement of the Sun's surface motions with a high spatial and temporal resolution is still a challenge. We wish to validate horizontal velocity measurements all over the visible disk of the Sun from Solar Dynamics Observatory/ Helioseismic and
Externí odkaz:
http://arxiv.org/abs/1303.4271
Autor:
Roudier, Th., Rieutord, M., Malherbe, J. M., Renon, N., Berger, T., Frank, Z., Prat, V., Gizon, L., Svanda, M.
For the first time, the motion of granules (solar plasma on the surface on scales larger than 2.5 Mm) has been followed over the entire visible surface of the Sun, using SDO/HMI white-light data. Horizontal velocity fields are derived from image corr
Externí odkaz:
http://arxiv.org/abs/1203.0514
Autor:
Roudier, Th., Svanda, M., Meunier, N., Keil, S., Rieutord, M., Malherbe, J. M., Rondi, S., Molodij, G., Bommier, V., Schmieder, B.
We study the influence of large-scale photospheric motions on the estabilization of an eruptive filament, observed on October 6, 7, and 8, 2004, as part of an international observing campaign (JOP 178). Large-scale horizontal flows were invetigated f
Externí odkaz:
http://arxiv.org/abs/0711.3112